Paris Saint-Germain hit their first obstacle upon a return to training when the club announced on Tuesday that three players and one staff member "showed historic positive" test results for the coronavirus.
Those concerned had symptoms during confinement when they weren't in contact with each other. They are no longer contagious and can carry on their training programme.
Starting yesterday and carrying on until tomorrow, the players have been undergoing medical and physical tests. The start of activities at the Ooredoo training centre will be on Thursday with small groups of players as per the medical and sanitary protocol of Paris Saint-Germain.
In April, PSG were crowned champions of Ligue 1 for a pandemic-shortened campaign after French Prime Minister Edouard Philippe initially declared professional sports wouldn't return to the country until at least September due to the uncontrolled virus outbreak.
Last week, UEFA confirmed that PSG and the other seven Champions League quarterfinalists will flock to Lisbon, Portugal in August to finish the competition via a tournament that will move to a single-elimination format.
The first quarterfinal matches are scheduled for Aug. 12, with the Final set for Aug. 23 at the Estadio da Luz.